Difference between 75w-90 and 80w-90 gear oil? | Ford Explorer Forums

  • Register Today It's free!

Difference between 75w-90 and 80w-90 gear oil?

briwayjones

Manual Master
Joined
December 11, 2003
Messages
4,409
Reaction score
8
Location
Maryland, USA
City, State
Eldersburg, MD
Year, Model & Trim Level
2000 Ford Explorer XLS
I'm going to switch my rear diffy to synthetic oil on my '03 Sport which calls for 80w-90. All the store had in synthetic was 75w-90. Can a regular old solid rear with open differential tell any difference between 75w-90 and 80w-90? I can't see it making any difference.

Also I'm going to switch the transmission to synthetic fluid also. It's a manual trans. and calls for Mercon. But with it being a non-picky manual transmission Mercon V isn't going to hurt anything is it?
 






Back
Top